Pulverizer and grader.



PATENTED JULY 5, 1904.

J. W. BOILEAU.

PULVERIZER AND GRADER.

APPLICATION FILED F3112. 1901.

SHEET 1.

N0 MODEL.

3 SHEETS- 4 l Paw Y L U .J D m N E T A P U A E L I O B W .J 00 6 4 n0 7 0 N PULVERIZER AND GRADBR.

APPLICATION FILED FEB, 2, 1901.

3 SHEETS-SHEET 2,

N0 MODEL.

No. 764,268. V PATENTED JULY 5, 1904. J. W. BOILEAU.

PULVERIZBR AND GRADER.

MODEL PPLIOATION FILED FEB. 2, 1901. 3 SH'BETSwSHEBT 3' Nuns-1211:

NITED STATES Patented July 5, 1904.

PATENT OFFICE.

TO JAMES B. KNOBLOOK,

OF DENVER, COLORADO.

PULVERIZER AND GRADER.

QPECIFICATION forming part of Letters Pat N 764,268, dated July 5, 1904.

Application filed February 2, 1901- Serial No. 45,715. (No model.)

To U, Lu/120711 it nut concern:

Be it known that I, JAMES W. BOILEAU, a citizen of the United States, residing at 1838 California street, in the city of Denver, county of Arapahoe, and State of Colorado, have invented new and useful Improvements in Pulverizers and Graders, of which the following is a specification.

My invention provides in one apparatus means whereby rock, bone, cereals, and the like may be pulverized to any desired degree of fineness and means whereby the product may be sized and graded. The pulverization I accomplish by means of currents of air generated by rapidly-revolving blades and meeting at different angles. The particles of matter to be treated are carried by the opposing air-currents violently into and against other particles and by the force of the impact are disintegrated. The grading is done by another auxiliary air-current which carries the pulverized product in suspension over a series of compartments into which the product is deposited according to relative size.

In the accompanying drawings I have illustrated a preferred form of my apparatus, in which Figure 1 is a side elevation of the plant, the grading portion being shown in section. Fig. 2 is a vertical section of the pulverizer. Fig. 3 is a vertical transverse section of the grading-chamber. Fig. 4 is a vertical section of the pulverizer, taken at right angles to Fig. 2. Fig. 5 is one of the pulverizingwheels, and Fig. 6 is one of the blades removed from the wheel.

The pulverizer-casing is composed of end plates 1 and cover 2. Mounted thereon are brackets 1 and 1" and shaft-bearings 1" and 1", supporting shafts 3, each carrying a series of pulverizing-wheels. While I have shown three shafts each carrying four wheels, the number of each may vary, the relative location of the shafts and the shape of the casings being changed to accord. In the shafts are mounted pulleys 4 and 4:, driven by independent belts 5 and 5, so that one or more of the shafts may be thrown out of operation without interfering with the others. The

belts are preferably so arranged as to drive the contiguous shafts in the same direction.

Each pulvcrizing-wheel in the series comprises a hub 6 and a central disk 6. Each disk is provided with a plurality of equallyspaced slots 6", extending through the same diagonally in alternate directions, but each at an angle of preferably forty-live degrees to the plane of the disk, though this angle may be varied somewhat to suit the material under treatment. These slots are larger at their inner ends, so as to be tapering and to cause the wedge-shaped blades 7 to be the more firmly held therein by centrifugal force when in operation. The blades are secured against lateral displacement by set-screws 8. The blades extend beyond the circumference of the disk, and each blade being at right angles to the preceding one they form a zigzag periphery for the wheel. The wheels on each shaft are also relatively disposed, so that the blades on adjoining wheels will be auright angles to each other, thus presenting zigzag lines of pulverizing edges as viewed lengthwise of the shaft.

The shafts are so spaced apart that the wheels will rotate freely without interference with the wheels on the other shafts, the different series running clear.

The feed-hopper 9 is provided with the grizzly 10 to prevent the entry of large pieces of matter. It contains the feed-roller 11, having agitating-arms 1). and mounted on springs 13 in bearings. This roller is operated by the pulley 15, driven by belt 16 from pulley 17 on shaft 18 in the bracket 19 by the belt 21 from the pulley 22 on power-shaft 23. The feed-roller is so arranged as to feed the matter evenly and prevent the entrance of air in any considerable quantity.

On the opposite side of the pulverizingchamber is the discharge-opening 2, covered by the grizzly 24 and screen '25, through which the pulverized product is drawn by an air-current induced by the fan 26 into the grading-chamber 27.

The grading-chamber is oblong and has a sloping bottom 27", divided by the transverse ribs 27" into compartments 27". Centrally of the bottom extends the screw conveyor 29. In each of the compartments below the conveyer is an outlet 27, controlled by valves 30.

The very finely pulverized product is not deposited in the compartments of the gradingchamber, butis carried by the exhaust-current into the settling-chamber 31, where it is deposited in the sloping bottom 31 and removed by the conveyer 36 into the bin 37 for further treatment or to be utilized as desired.

The fan 26 produces a constant forced draft out of the pulverizing chamber into the grading-chamber, into the settling-chamber, through the screen 33 on the brackets 34, and thence through the fine 35 back into the pulverizcr through the opening 1*, and thus in cycle. On the flue 35 is located the vent 38 and the valve 39, regulating the pressure in the flue.

The power-shaft 23 carries the pulley 40, communicating by belt 44 with the intermediate pulley 43, thence by belt 47 with the fan-shaft 46, and also by belt 51 with the pullcy 49 on the shaft 50. The shaft 50 also carries the bevel-gear 53', operating the shaft 29 of the conveyer 29.

Connected with the outlets 27 by the pipes 54, containing the valves 54, is a series of mixing-chambers 55, containing paddles 56 for mixing the product with water admitted from a suitable water-supply preparatory to concentration or amalgamation. The paddles 56 are mounted on the shafts 56 and connected by intermediate gearing with the shaft 50.

In operation the pulverizing wheels are caused to rotate at a speed approximating one thousand two hundred to two thousand revolutions per minute, thus creating violent aircurrents running from one wheel into another and from one series into another. The matter to be pulverized is fed into the pulverizingchamber by the feed-roller. The particles are caught up by the air-currents and carried thereby, meeting other particles carried by opposing currents, and are speedily disintegrated by the force of the impact assisted by contact with the rapidly-movingblades. When sufiieiently reduced to pass through the screen 25, which may be approximately of 20 to 30 mesh, the pulverized product is carried by the exhaust-current into the gradingchamber. Here the larger particles are deposited in the compartments nearest the pulverizer and the relatively smaller particles in the compartments farther on, while the extremely fine dust is carried by the draft through into the settling-chamber, where it is caused to settle and is disposed of as stated.

The mesh of the screen 25 and the speed of the exhaust-fan 26 will be regulated according to the degree of fineness to which it is desired to carry the pulverization and the size desired to be carried into the settling-chamber by the draft. The more violent the exhaust the larger the particles carried past the grading-chamber without deposit.

The product deposited in the compartment nearest the pulverizer or in any other of the compartments may be returned at will by the conveyer 29 to the pulverizer for further treatment, or by opening the outlets 27 the product may be withdrawn, as stated.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A pulverizer-wheel comprising a disk having radial blades extending from a point near the hub thereof and projecting obliquely on each side of the disk, said blades having their obliquity alternately reversed.

2. A pulverizer-wheel comprising a disk having blades extending therethrough at an angle of approximately forty-five degrees to the axis of the Wheel and with the blades cutting the plane of the disk and extending on either side thereof with their inner ends abutting the hub of the disk.

3. A pulverizer-wheel comprising. a wheel having blades removably secured therein and extending therethough in planes at an angle of approximately forty-five degrees to the axis of the wheel, the blades extending beyond the plane of the disk on either side thereof throughout their length and with their inner ends abutting the hub of the disk.

4. A pulverizer-wheel comprising a disk having peripheral blades With enlarged inner ends located near the hub of the disk, said blades fitted in tapering openings and projecting obliquely through and beyond the face and periphery of the disk at an angle of approximately forty-five degrees to the axis of the wheel and adapted to be firmly held in place by the centrifugal force of the wheel when in operation.

5. A pulverizing-wheel comprising a disk having radial openings or slots extending from a point near the hub thereof toward the periphery and obliquely through the disk at an angle to the plane thereof, blades secured within the slots and projecting on each side of the disk, said blades having their obliquity alternately reversed.

6. A pulverizer-wheel comprising a wheel having radial tapering slots extending from a point near the hub of the disk to its periphery and obliquely through the disk at an angle of approximately forty-five degrees to the plane thereof, tapering blades fitted within and removably secured in the openings, the blades projecting beyond the periphery and on each side of thedisk and being disposed alternately at an angle of approximately ninety degrees to eachv other.

7. A pulverizer having a series of wheels on a common shaft, each wheel comprising a disk carrying blades disposed at an angle to the plane of the disk and alternately at an angle to each other so as to present azigzag peon a common shaft, each wheel comprising a disk carrying blades disposed at an angle of approximately forty-five degrees to the plane of the disk and alternately at an angle of approximately ninety degrees to each other so as to present a zigzag periphery to the wheel, the wheels being arranged on the shaft so that the blades of adjoining disks will be disposed at approximately the same radial distance from the shaft and at an angle of approximately ninety degrees to each other and present a zigzag line of pulverizing edges as viewed lengthwise of the series.

9. A pulverizer comprising a plurality of shafts, each shaft having mounted thereon a series of pulverizing-wheels, each wheel consisting of a disk having radial openings or slots extending from a point near the hub thereof toward the periphery and obliquely through the disk at an angle to the plane thereof, blades secured within the slots, said blades being disposed in intersecting planes, the blades of adjoining wheels in each series disposed at an angle to each other so as to present a zigzag line as viewed lengthwise of the series, the several shafts so relatively arranged that the periphery of one series of wheels will not intermesh with the periphery of another series.

10. A pulverizer comprising a plurality of shafts, each shaft having mounted thereon a series of pulverizing-wheels, each wheel consisting ofadisk provided with radial openings extending obliquely through the disk in opposite directions alternately at an angle of approximately forty-iive degrees tothe plane of the disk and ninety degrees to each other, blades removably secured within the openings with their inner ends approaching the hub and with their outer ends extending beyond the periphery of the disk, the blades of adjoining wheels in each series disposed at approximately ninety degrees to each other so as to present a zigzag line of pulverizing edges as viewed lengthwise of the series, the several shafts so relatively arranged parallel that the periphery of one series of wheels will not intermesh with the periphery of another series. i

In testimony whereof I have affixed my sig nature in presence of two witnesses.

JAMES W. BOILEAU.

Witnesses:

I-TERMANN Gr. OVER'BECK, LoUIs BEYER, Jr. 

